The UKIRT Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) presents an unparallelled resource for the study of field brown dwarfs. The UKIDSS Cool...

Ultracool subdwarfs are low luminosity, late-type M and L dwarfs that exhibit spectroscopic indications of subsolar metallicity and halo kinematics. Their...

A significant fraction of ultraluminous X-ray sources appear to be embedded in observable ionized nebulæ that take the form of large, several 100 pc diameter...

Optical studies of ultraluminous X-ray sources (ULX) in nearby galaxies have turned out to be instrumental in discriminating between various models including...

High resolution spectroscopy demands detector operation in an extremely stable mechanical and thermal environment; any tiny perturbation may affect the location...

GALEX (the Galaxy Evolution Explorer) has provided far-UV(1344-1786Å) and near-UV(1771-2831Å) imaging of several Planetary Nebulae (e.g., Bianchi et al. 2008...

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The column density distribution of the local interstellar medium (LISM) towards a sample of 15 fast rotators observed with IUE at high resolution is reported...

Measurement of the magnetic field throughout the solar atmosphere is crucial to a quantitative understanding of energy transfer from the photosphere to the...